How severe is CVE-2024-45394?

CVE-2024-45394 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-45394 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-45394?

CVE-2024-45394 affects Authenticator. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-45394?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-45394 have an EU (EUVD) identifier?

Yes. CVE-2024-45394 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-41456.

When was CVE-2024-45394 published?

CVE-2024-45394 was published on 2024-09-03 and last updated on 2026-06-17.

CVE-2024-45394

CVE-2024-45394 is a high-severity vulnerability in Authenticator with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-326.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-41456
Weakness: CWE-326
Affected product: Authenticator
Published: 2024-09-03
Last modified: 2026-06-17

Description

Authenticator is a browser extension that generates two-step verification codes. In versions 7.0.0 and below, encryption keys for user data were stored encrypted at-rest using only AES-256 and the EVP_BytesToKey KDF. Therefore, attackers with a copy of a user's data are able to brute-force the user's encryption key. Users on version 8.0.0 and above are automatically migrated away from the weak encoding on first login. Users should destroy encrypted backups made with versions prior to 8.0.0.

Frequently asked questions

What is CVE-2024-45394?: Authenticator is a browser extension that generates two-step verification codes. In versions 7.0.0 and below, encryption keys for user data were stored encrypted at-rest using only AES-256 and the EVP_BytesToKey KDF. Therefore, attackers with a copy of a user's data are able to brute-force the user's encryption key. Users on version 8.0.0 and above are automatically migrated away from the weak encoding on first login. Users should destroy encrypted backups made with versions prior to 8.0.0.
How severe is CVE-2024-45394?: CVE-2024-45394 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-45394 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-45394?: CVE-2024-45394 affects Authenticator. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-45394?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-45394 have an EU (EUVD) identifier?: Yes. CVE-2024-45394 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-41456.
When was CVE-2024-45394 published?: CVE-2024-45394 was published on 2024-09-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:authenticator:authenticator:*:*:*:*:*:*:*:*

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